Disk-sharpener



UNITED STATES PATENT OFFICE.

JAMES D. ARMSTRONG, OF BAYARD, IOWA.

DlSK-SHARPEN ER.

SPECIFICATION forming part of Letters Patent No. 558,922, dated April28, 1896.

Application filed December 30, 1895. Serial No. 573,822. (No model.)

To aZZ whom it may concern:

Beit known that I, JAMES D. ARMSTRONG, a citizen of the United States,residing at Bayard, in the county of Guthrie and State of Iowa, haveinvented certain new and useful Improvements in Disk-Sharpeners; and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to certain new and useful improvements indisk-sharpeners, and

especially to a simple construction of tool adapted to hold acutting-blade on a standard and means for forcing the cutting edgeagainst the beveled edge of the disk as the latter is caused to revolveon a shaft.

The invention relates, further, to apeculiar construction of standard,which is adapted to rest on the ground, and carrying an adjustablecutting-blade held at an angle, and of a lever pivoted to the saidstandard,- which lever carries a friction-wheel provided to hold a diskinterposed between the standard and lever in contact with the cuttingedge. By my improved sharpening device I am enabled to easily apply thesame inthe field or wherever convenient, and can regulate the working ofthe tool to cut any angle of bevel on the disk.

To these ends, and to such others as the invention may pertain, the sameconsists, further, in the novel construction, combination, andadaptation of the parts, as will be hereinafter more fully described,and then specifically defined in the appended claim.

I clearly illustrate my invention in the accompanying drawings, which,with the letters of reference marked thereon, form a part of thisspecification, and in which drawings similar letters of referenceindicate like parts throughout the views, in which- Figure 1 is a sideelevation of my disksharpener. Fig. 2 is an edge view showing the broadside of the disk held bythe sharpening-tool.

Reference now being had to the details of the drawings by letter, Adesignates the standard of the tool, the lower end of which hasdownwardly-projecting points a tohold thestandard from slipping. Locatedat any suitable position on the standard, preferably above the middle ofthe same, is the cuttingblade B, set at an angle in an aperture 1) ofthe said standard and held in placeby the wedge-shaped member D.

Pivoted to the standard at c is the leverE, which carries afriction-wheel F, journaled on a projection f thereon.

G is a disk, mounted on a shaft K, and is adapted to be revolved by anyconvenient means.

In operation the disk is held between the friction-wheel and thecutting-blade-that is, the beveled edge of the disk-and caused torevolve, and the operator, by forcing the edge of the disk against theblade, mayreadily regulate the cutting.

The standard, it will be seen, is provided with a series of apertures aa, so as to allow the lever E to be adjusted for holding different-sizeddisks. The cutting edge B is provided with a shoulder D to prevent theblade crowding through the aperture holding it when the edge of theblade is forced against the disk.

Having thus described myinvention, what I claim to be new, and desire tosecure by Letters Patent, is-- A disk-sharpener consisting of a standardA having the points a on its lower end, a cutting-blade carried by thesaid standard, combined with a lever pivoted to the standard and afriction-wheel pivoted on a projection of the said lever, whereby thesame may be swung against a disk to regulate the depth to which it isdesired to have the blade cut, all substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES D. ARMSTRONG.

Witnesses: A

L. A. OCHELTREE, WM. W. SELLIJY.

